Mine trolley-hanger.



No. 643,327. Patented Feb. l3, I900.

G. E. JAMME, JR. MINE TROLLEY HANGER.

(Application filed June 17, 1899.)

(No Model.)

w v w w .W MWM u rm n n. Du m UNITED STATES PATENT OEEIcE.

GEORGE E. JAMME, JR, OF PITTSBURG, PENNSYLVANIA.

MINE TROLLEY-HANGER.

' SPECIFICATION forming part of Letters Patent N 0. 643,327, dated February 13, 1900.

Application filed June 17, 1899. erial No. 720,897- (No model.)

To ttZZ whom it may concern:

Be it known that LGEORGE E. JAMME, Jr., a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Mine Trolley- Hangers; and I do declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in trolley-hangers.

The object of my invention is to provide a hanger of this class that can be attached in place without the use of either screws or screwthreads.

The invention is particularly adapted for use in suspending trolley-wires in coal and other mines.

With the above object in view the invention finallyconsists in the novel construction, combination, and arrangements of parts,'as will be hereinafter more fully described in detail.

In describing the invention in detail reference is had to the accompanying drawings, which form a part of this specification ,wherein like reference characters denote like detail parts in the several views, in which- Figure 1 is a vertical side elevation of my improved hanger, having an insulator attached, which is shown in section. Fig. 2 is a plan view of the same with insulator attached. Fig. 3 is a perspective View of the expansion-plug. Fig. 4 is a vertical side elevation of the device, showing the manner in which the same is used in the mine.

Referring to the drawings, the letter E designates a metal tube of suitable dimensions and in which the upper end of same is split or divided for a short distance into two or more parts by the slots F. A tapering Wood plug G is fitted loosely into the split end of the tube, so that when the tube, with its plug, is driven into a hole prepared for its reception in the roof of the mine the plug will be driven farther or fully into the end of the tube, thereby expanding the tube, so that it will be rigidly held in place. Besides the expansion of the tube by the taper in the plug the same absorbs moisture and expands, thereby greatly increasing its hold in the mine-roof. the lower end of the tube, and upon this threaded end is screwed the metal shell A, and it is held against further rotation by a set-screw J. This shell is filled with suitable insulating material B, which has embedded therein the screws 0 and D, the former being to hold the insulation in place and the latter one is intended to connect to the clip for suspending the trolley-wire.

Heretofore it has been difficult to attach hangers to either the roof or sides of the A thread is formed upon D mines, owing to the nature of the material forming said walls or roof. WVith the use of this device these difficulties are not only overcome, but it has the advantage of remaining in position even after the wires are broken away from the same by falling parts of the roof. The device is not alone practical, but is comparatively inexpensive to manufacture and can be applied by anyone.

Having thus fully shown my invention, described the same, and set forth its advantages, what I claim, and desire to secure by Letters Patent, is-

1. A trolley-hanger for mines, comprising, in combination, a tube having a split upper end, a plug carried by said tube inserted in said upper end and operating to expand the same automatically and secure the hanger to the roof of the mine when introducedinto the latter with said tube, and an insulator secured to the lower end of said tube, substantially as described.

2. The herein-described trolley-hanger for mines, comprising, in combination, a tube having a split upper end, a tapered plug expanding said tube and securing it in place, a shell attached to the lower end of said tube, an insulating material secured in said shell, and a means embedded in said insulating material for attaching thereto the clip which suspends the trolley-wire, substantially as described.

3. The herein-described trolley-hanger for mines, consisting of a tube having a split up per end and a threaded lower end, a tapered clip which suspends the trolley-Wire, substanwooden plug inserted in said split end of the tially as described. 10 tube and expanding the same, ashell thread- In testimony whereof I afiix my signature ed upon said lower end of the tube, an insuin presence of two Witnesses.

5 lating material in said shell, a screw embed- GEORGE E. JAMHE, JR. I

ded in said insulating material and securing Witnesses: the same in place, and a screw embedded in J AS. J. MGAFEE,

said insulating material for connecting to the E. S. lVILLIAMs. 

